diff --git a/README.md b/README.md
index 7cfec440..1800e782 100644
--- a/README.md
+++ b/README.md
@@ -200,6 +200,7 @@ You can create a `.terraformignore` in the root of your project and add the foll
 | domain\_names | Alternative domain names for the CloudFront distribution. | `list(string)` | `[]` | no |
 | domain\_zone\_names | n/a | `list(string)` | `[]` | no |
 | expire\_static\_assets | Number of days after which static assets from previous deployments should be removed from S3. Set to -1 to disable expiration. | `number` | `30` | no |
+| image\_optimization\_version | Next.js version from where you want to use the image optimizer from. Supports semver ranges. | `string` | `null` | no |
 | lambda\_environment\_variables | Map that defines environment variables for the Lambda Functions in Next.js. | `map(string)` | `{}` | no |
 | lambda\_memory\_size | Amount of memory in MB a Lambda Function can use at runtime. Valid value between 128 MB to 10,240 MB, in 1 MB increments. | `number` | `1024` | no |
 | lambda\_policy\_json | Additional policy document as JSON to attach to the Lambda Function role | `string` | `null` | no |